Dear Friend,
If you have more than 4 years of experience or no matter how much experience you have(20 or 30 years); the points you get are same as per the Canada Official Website. More over you can mention all your experience.
How old are you? If you are above 49 years, they you may loose some points on age factor. There are total of 6 Factors on which you are judged upon. Please follow the below link to know what those factors are and you can test your eligibility as well. I guess you are eligible under NOC 0213 for FSW 1(Federal Skilled Worker Category 1). Three categories available, check all three and come up with a decision.
http://www.cic.gc.ca/english/immigrate/skilled/assess/index.aspMy suggestion is that do not include that freelancer job you did, it will not do you any good.
Best Regards,
Hemant Pandya